install server
yum install krb5-server
and if the libs are not installed
yum install krb5-libs
set a hostname
hostname noplace.org
copy krb5.conf to /etc/
copy kdc.conf to /var/kerberos/krb5kdc
init the database and admin principals.
kdb5_util create -s
add an admin principal
kadmin.local
while running kadmin.local enter
addprinc master/admin